Patent GB-839962-A (GB)
Title: A device for recording and adding weights
IPC: G01G23/18
Filed: 1956-11-05
Abstract: 839,962. Signalling reading of weighing machines. KOOPERATIVA FORBUNDET EKONOMISK FALNING. Nov. 5, 1956 [Jan. 25, 1956], No. 33740/56. Class 40 (1). [Also in Group XVIII] In a measuring device, e.g. a weighing machine, in which members rotating with the pointer are sensed by feelers controlling, through contacts, magnets in a recording device (adder or printer) a first set of feelers for sensing the lowest order digit causes a displacement in the direction of movement of the pointer, of the feelers for higher order digits so that they sense their corresponding members at a constant position with reference to the zero line of the lowest order value irrespective of the value of the lowest order digit. The weighing machine has a dial 1, Fig. 2 and a co-operating pointer 3 on a shaft 4 the other end of which carries a sensing disc 5 having holes 6, Fig. 1. The holes correspond with the smallest unit of weight on the dial 1, i.e. one tenth of a kilogram. Sensing pins 7 are provided on the disc spaced to correspond with kilograms on the dial and arcuate bars 8 are provided on the disc each occupying an angle equal to a ten-kilogram spacing on the dial. The holes 6 are sensed by pins 10 on a carriage 9 which is movable bv magnet AM towards the disc so that one of the pins passes through the hole according to the position of the pointer. The pins which have passed through a hole causes an associated contact 11 to close and give a marking on one of ten output lines A. The pins 7 and bars 8 are sensed by pins 12 and 13 respectively which are mounted in a holder 14 so as to be movable horizontally on a holder 15 which in turn is swingable about the same axis as the disc under the control of a magnet BM. The magnitude of the displacement is determined by one of the magnets M1-M9 the armatures of which engage recesses 16a in a segment 16 moving with holder 15. Each of these magnets corresponds to one of the pins 10 so that if the lowest digit 5 is sensed the magnet M5 is energized to limit the motion of the holder 15. The arrangement is such that the quadrant is brought to the same position relative to the holes 6 in the disc 5 irrespective of the value of the lowest digit sensed, one of the pins 12 in holder 14 accordingly registers exactly with one of the pins 7 whereby a contact 17 is closed when the magnet CM is energized, to give a marking on one of the ten output lines B to indicate the value of the kilogram digit. One of the radial row of pins 13 engages one of the arcuate bars 8 to cause one of contacts 18 to be closed to give a marking on one of the ten outputs C. The tenth contact 18 representing a hundred of kilograms is connected to a line D. The reading is transmitted digit by digit over ten lines to the magnets of adding machine or printing machine, multi-position switches being provided to connect the hundred line D, the tens lines C, the units lines B and the tenths lines A in turn to the control magnets and then to energize a release magnet which initiates an adding or printing operation and restores the sensing apparatus to its initial condition. In a modification the lowest order sensing pins are carried on a movable holder which is displaced according to the value sensed, thereby displacing the disc relative to stationary sensing pins for the higher orders.